feat(resources): bundle color themes and compiled xterm-ghostty terminfo

Makes the resources directory self-contained like Ghostty's share/ghostty:
- themes/: the 463 iTerm2-Color-Schemes themes Ghostty 1.3.1 ships
  (release 20260216-151611-fc73ce3), with the upstream MIT license.
- terminfo/: xterm-ghostty compiled with `tic -x` from the terminfo
  source generated by ghostty-termio; `infocmp -x` is identical to the
  installed Ghostty's entry.

The generator script and resources-dir discovery changes follow in a
separate commit.

Test Plan:
- TERMINFO=resources/terminfo infocmp -x xterm-ghostty

resources/themes/Vague

@@ -0,0 +1,22 @@
+palette = 0=#252530
+palette = 1=#d8647e
+palette = 2=#7fa563
+palette = 3=#f3be7c
+palette = 4=#6e94b2
+palette = 5=#bb9dbd
+palette = 6=#aeaed1
+palette = 7=#cdcdcd
+palette = 8=#606079
+palette = 9=#e08398
+palette = 10=#99b782
+palette = 11=#f5cb96
+palette = 12=#8ba9c1
+palette = 13=#c9b1ca
+palette = 14=#bebeda
+palette = 15=#d7d7d7
+background = #141415
+foreground = #cdcdcd
+cursor-color = #cdcdcd
+cursor-text = #141415
+selection-background = #252530
+selection-foreground = #cdcdcd